How to run an excel macro in powerpoint

Hi there,

I have a presentation in power point with a chart on it. In office 2007 the charts are linked to excel, so if you change the data in the excel cells you will see the changes on your chart right away.
My question is: How do you run a macro from power point that change that cells?
The current macro I’m running from excel is:
mycount = Range(“b2”) + 100
Range(“b2”) = mycount

but I will like to run it from power point and I don’t know how to link power point to excel.

Any advice??
Thanks in advance!!!